Optimistic vs. ZK Rollups
Compare and contrast Optimistic Rollups and Zero-Knowledge Rollups, exploring their mechanisms and trade-offs.
Welcome to Rollups Deep Dive
In the previous lesson, we explored Layer 2 solutions for scaling blockchains. Today, we'll dive deeper into the two most prominent types of rollups: Optimistic Rollups and Zero-Knowledge (ZK) Rollups.
These technologies are crucial for making decentralized applications faster and cheaper to use.
What are Optimistic Rollups?
Optimistic Rollups operate on the assumption that all transactions processed off-chain are valid. They 'optimistically' believe everything is correct, without immediate cryptographic proof.
- Transactions are bundled together off-chain.
- A summary (state root) is posted to the Layer 1 (L1) blockchain.
- This reduces L1 congestion and transaction costs significantly.